To ensure Microsoft 365 Copilot forgets the details of your trip, you can manage and delete specific memories directly through the settings or by using natural language prompts.
Ways to Delete Memories
Use Natural Language: You can simply ask Copilot to forget specific information. For example, prompt it with: "Forget the details about my trip to [Destination]".
Manage via Settings:
Open Copilot Chat and sign in.
Select the three dots (...) at the top right and go to Settings.
Select Personalization and find the Saved memories section.
Click Manage saved memories to view a list of what Copilot has remembered.
You can then delete individual items related to your trip or select Delete all memories to clear everything.
Note:
Clearing Interaction History
While deleting a memory stops Copilot from using that specific detail in future chats, the record of your conversation remains in your activity history unless also cleared.
Individual Chats: Delete specific trip-related chat threads from your history sidebar by clicking the three dots next to the chat title and selecting Delete.
Full History: To wipe all interaction history across all Microsoft 365 apps, visit the Microsoft Privacy Dashboard and navigate to Settings & Privacy > Privacy > Copilot activity history.
Reference:
https://support.microsoft.com/en-us/topic/manage-copilot-memory-in-microsoft-365-copilot- b3231eae-9e60-4b3c-ac58-81fddbe56279